How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Chuck Williams Your Own Question

Chuck Williams
Chuck Williams, Technician
Category: TV
Satisfied Customers: 3810
Experience:  Over 25 years of experience servicing AV electronics to component level, ISF and THX Cert.
13758627
Type Your TV Question Here...
Chuck Williams is online now
A new question is answered every 9 seconds

I have an Jan 2008 LG 50PC5D Plasma Tv. I have sound but no

Resolved Question:

I have an Jan 2008 LG 50PC5D Plasma Tv. I have sound but no picture. I have a few questions?
Is this a common problem?
Is this a fairly easy fix (I have an electronic repair confidence level of about a 6)
Are the parts costly and readilly available?
Is this better left to the experts and approximately what would a tech charge?

Thanks

Bill
Submitted: 4 years ago.
Category: TV
Expert:  Chuck Williams replied 4 years ago.

Hi, Bill!

 

Yes, this is a common problem, and may very well be a fix that you can do. A proficiency level of 6 is better than some "techs", by the way.

 

Can you tell if the panel "charges"? It would look like a very dim screen, you may have to be in a darkened room to see it, but you should clearly be able to see the difference between the set being on and off.

 

Let me know!

 

Chuck

Customer: replied 4 years ago.

Hi Chuck,

Yes it gives me a little flash and then very dim.

Expert:  Chuck Williams replied 4 years ago.
OK, then what it sounds like you have is either a defective Y Sustain or Z Sustain board. These are located on the left and right sides of the panel. The problem is that there is no easy way to determine which is causing the problem.

 

But if you are comfortable taking the back off of the set, there's one quick and dirty method that's worked well for me many times. Take the back off, power up the set, let it run for 10 minutes, and carefully feel the various heat sinks on these two boards. All of them should be at least moderately warm. If you find one that's cold, there's a good possibility that that board is where the problem is.

 

See what you can find and let me know.

 

Chuck

Customer: replied 4 years ago.
Got it. I'll try it now.
Expert:  Chuck Williams replied 4 years ago.

I'll be offline for a few hours, but I'll check back later.

 

Chuck

Customer: replied 4 years ago.

Chuck,

Thats a great idea and makes perfect sense however a different problem seems to have come to light. The heat sinks on both the YSUS and ZSUS warmed up as descibed. In fact all the heat sinks warmed up except on the power supply (SanKen EAY32929001). Of the 6on the board I have two on the primary side dead cold. I think its the primary because of the writing on the board and the main a/c power goes into there first. In looking at all the parts costs on line (looks like about 325.00 to 350.00 to replace all three items) I am trying to justify that expendature for a TV that this problem seems to occur frequently. In you opinion should I just chalk the 17.00 for your time up to experience or do you think this unit is worth the investment? Just like when I buy a car I talk to the service department first, so I value your opinion.

 

Thanks

 

Bill Martin

XXXXX@XXXXXX.XXX

XXX-XXX-XXXX

Expert:  Chuck Williams replied 4 years ago.

Bill, there are a couple of heat sinks on the power supply that usually don't get warm, so that sounds normal.

 

But if all of the heat sinks on the Y and Z Sustain boards are comfortably warm, then I don't think they are the problem.

 

But you said that you do get some sort of light on the screen, correct?

 

And, I'm guessing that if you press the MENU button on the set, you do not get the LG menu on screen, correct?

 

Chuck

Customer: replied 4 years ago.
That is correct I do not get the menu screen.
Expert:  Chuck Williams replied 4 years ago.

Bill, can you confirm whether or not the screen charges when it's on (very dim glow)?

 

Chuck

Customer: replied 4 years ago.
I do get the very dim glow.
Expert:  Chuck Williams replied 4 years ago.

Then this really isn't a common failure for this set. The Y and Z sustains are far more common, and if one of them were bad, the screen wouldn't glow.

 

Thee's an outside chance that the problem is the panel, but that's not as likely as the digital main board being bad.

 

I don't have the manual for this, can you take a digital photo of the back of the set and post it?

 

Chuck

Expert:  Chuck Williams replied 4 years ago.

Also, there is probably a suffix on the model number, let me have that, too.

 

Chuck

Customer: replied 3 years ago.

Not sure if you got it but here is the full model number. PDP50X40D36

 

Expert:  Chuck Williams replied 3 years ago.

Nope, that's not right. The 50PC5D number is XXXXX but there are some extra letters after that model number, it will be on the back panel.

 

Chuck

Customer: replied 3 years ago.

The previous number was on the chassis on a tag in the uper LH corner. The number on the back of the panel is 50PC5D-UL.AUSRLHR.

 

Hope this helps.

 

Bill

Expert:  Chuck Williams replied 3 years ago.

Bill, that's what I was looking for.

 

And I don't have great news. The part number for the "main chassis," which is everything except the Y and Z sutain boards and power supply, is EBT36489708, and would cost in the $335 range, but my LG parts supplier says it's no longer available.

 

And if you could get this part, I'd say go for it, and that should get you fixed up.

 

But what I might suggest is to contact either PTS Corp. or Tristate Module and see if they either have a rebuilt chassis or can rebuild/repair yours.

 

Let me know if there's anything else I can do for you, and thanks for using JustAnswer!

 

Chuck

Chuck Williams, Technician
Category: TV
Satisfied Customers: 3810
Experience: Over 25 years of experience servicing AV electronics to component level, ISF and THX Cert.
Chuck Williams and other TV Specialists are ready to help you
Customer: replied 3 years ago.

Chuck,

Thanks for all your help. I think at this point I'll just put it up for sale as a parts unit.

 

Thanks again

Bill Martin

XXXXX@XXXXXX.XXX

Expert:  Chuck Williams replied 3 years ago.

Well, sorry, Bill, best of luck to you.

 

By the way, if you buy a new set, whatever you buy, be sure to get an extended warranty.

 

All of these TV's, regardless of whether it's plasma, LCD, or rear projection, have large and expensive assemblies that cannot be fixed, and must be replaced. This forum is replete with tales of woe about how the screen developed a defect and the set is out of warranty. The customer is left with a giant piece of e-Waste.

 

Let me know if there's anything else I can do for you, and thanks for the Accept, the bonus, and the feedback, I really appreciate it!

 

Chuck

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
< Last | Next >
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
  • I love this site! $9 instead of a repairman or new/used frig can't be beaten. This older woman will worry less now that she knows about this site. Bless you all. Windy USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TV/TVTech1/2013-3-25_625_TECH1Nobanner.64x64.jpg TV Tech1's Avatar

    TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
  • http://ww2.justanswer.com/uploads/OR/OriginalSeadog/2011-7-22_191917_ProfilePicture.64x64.jpg Rod's Avatar

    Rod

    TV & Communications Sys Repair

    Satisfied Customers:

    2354
    FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
  • http://ww2.justanswer.com/uploads/benimur/2009-03-29_003401_id_2.jpg Louie's Avatar

    Louie

    Technician

    Satisfied Customers:

    2208
    25+ yrs. experience in the field and 3+ yrs. online, down to component level.
  • http://ww2.justanswer.com/uploads/P0/p0llinate/2011-4-27_174649_tucker.64x64.JPG Nathan's Avatar

    Nathan

    Installer

    Satisfied Customers:

    1683
    Custom home theater installer, authorized dealer top brands.
  • http://ww2.justanswer.com/uploads/ST/steven.benoit/2011-4-1_194735_untitled1.64x64.jpg Steven's Avatar

    Steven

    Technician

    Satisfied Customers:

    1366
    Ma. Master Technician Lic. Authorized Warranty Support.
  • http://ww2.justanswer.com/uploads/IT/ITPeter/2011-5-3_23187_Pete.64x64.JPG Pete's Avatar

    Pete

    Electronic Engineer

    Satisfied Customers:

    1260
    12+ years experience installing and repairing electronics.
  • http://ww2.justanswer.com/uploads/3G/3guk/2011-1-15_132320_D1SC01363.64x64.jpg James's Avatar

    James

    Technician

    Satisfied Customers:

    1154
    AV Service Engineer (4 Years)
 
 
 
Chat Now With A TV Technician
Chuck Williams
Chuck Williams
TV Technician
3810 Satisfied Customers
Over 25 years of experience servicing AV electronics to component level, ISF and THX Cert.